Open both videos on different screens. Or different windows. Or two Shaler Area iPads. Or right here. Sync them and watch.
Northern Hemisphere - Smarter Every Day
Southern Hemisphere - Veritasium
WATCH THE IN-SYNC VIDEOS BEFORE YOU CONTINUE
So I've been wrong all this time? I'm glad I know. Their conclusion:
So I've been wrong all this time? I'm glad I know. Their conclusion:
- Toilet swirl depends on toilet design - water jets are angled to clean well.
- Sink swirl is seemingly random.
- Kiddie pool swirls follows the hurricanes and ocean currents.
Clockwise North
Counterclockwise South
Cyclones, hurricanes, and typhoons all spin because of the Coriolis effect; the effect of the rotation of the earth on the motion of air and water currents.
The Black Sea and the Great Lakes have circular currents dependent upon this effect. It proves that the earth rotates.
I ask my students to show me evidence to me that the earth is spinning but they can't even though many of them have seen a Foucault pendulum at Pittsburgh's Children's Museum. It's the easiest way to locally prove the rotation of earth.
Points on the equator are moving over 1,000 mph but Pittsburgh is only moving 700 mph and the North Pole is just rotating around a single point once every 24 hours. The Foucault pendulum shows that earth is round and rotating. It wouldn't happen if earth were a cylinder spinning on a central axis.
Derek and Destin in the synced videos demonstrated the opposite spins of the kiddie pools. INERTIA - the natural tendency of an object to maintain its state of motion - explains the Coriolis effect and the Foucalt pendulum.
The kiddie pools above, untouched for hours, began to spin on their own. They did, in fact, stop spinning in the "wrong" direction and accelerate in the direction that is correct for the hemisphere. Inertia - the Coriolis effect in miniature. Fascinating.
I had no idea. Science tends to self-correct over time. So should we.
The Black Sea and the Great Lakes have circular currents dependent upon this effect. It proves that the earth rotates.
I ask my students to show me evidence to me that the earth is spinning but they can't even though many of them have seen a Foucault pendulum at Pittsburgh's Children's Museum. It's the easiest way to locally prove the rotation of earth.
Foucault Pendulum shows earth rotation
Points on the equator are moving over 1,000 mph but Pittsburgh is only moving 700 mph and the North Pole is just rotating around a single point once every 24 hours. The Foucault pendulum shows that earth is round and rotating. It wouldn't happen if earth were a cylinder spinning on a central axis.
Derek and Destin in the synced videos demonstrated the opposite spins of the kiddie pools. INERTIA - the natural tendency of an object to maintain its state of motion - explains the Coriolis effect and the Foucalt pendulum.
The kiddie pools above, untouched for hours, began to spin on their own. They did, in fact, stop spinning in the "wrong" direction and accelerate in the direction that is correct for the hemisphere. Inertia - the Coriolis effect in miniature. Fascinating.
I had no idea. Science tends to self-correct over time. So should we.
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